JPS5815475Y2 - Blast furnace cooling plate gas seal device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cooling plate gas sealing device for a blast furnace.

Conventional cooling plate gas seal devices of this type include a type shown in FIG. 1 and a type shown in FIG. 2.

In the type shown in FIG. 1, a cooling plate 1, which is positioned on the furnace wall using the inside of the housing 3, is attached to a cooling plate housing 3 attached to a furnace shell 2 via an elastic packing 5. The elastic packing 5 is held on the cooling plate housing 3 by a ring-shaped holding member 7, and the cooling plate 1 is connected to a cooling water drain pipe 4, which is a cooling water supply pipe and a discharge pipe. The elastic packing 5 is designed to be able to bear the internal furnace load acting on the panel 1 to some extent, and also to absorb the movement of the furnace shell 2 and the internal refractory 6 caused by thermal expansion. This allows the cooling plate 1 to follow the action.

However, this method has a problem in that the gas sealing performance is affected by the precision with which the cooling plate housing 3 is attached to the furnace shell 2.

That is, if the mounting precision of the cooling platen housing 3 to the furnace shell 2 is poor, a gap is created at the contact surface between the elastic packing 5 and the cooling platen housing 3, and the furnace gas leaks from the gap.

In addition, in the model shown in Fig. 2, a telescopic joint 9 is arranged between the cooling water pipe 4 and the holding member 7 attached to the cooling plate housing 3 with a gasket 8 sandwiched therebetween, so as to create a gas seal. The cooling plate 1 is made to be able to follow the movement of the furnace shell 2 and the furnace refractory 6 caused by expansion by the action of the expansion joint 9.

However, in this method, the expansion joint 9 cannot hold most of the internal load acting on the cooling plate 1, so the cooling plate 1 easily moves due to the internal load, and therefore, when the cooling plate 1 is replaced. , it may be difficult to install the cooling plate 1.

Furthermore, since the connecting portion between the cooling panel 1 and the cooling water pipe 4 is covered with the expansion joint 9 and cannot be seen from the outside, it is difficult to detect water leakage at that portion.

The present invention was developed with the aim of eliminating the drawbacks of the conventional method described above, reducing installation man-hours, improving gas sealing performance, etc. In a cooling plate gas sealing device in which a cooling plate is inserted and the rear outer end of the cooling plate is aligned with the housing to seal the furnace gas passing between the cooling plate and the housing, the rear outer end of the cooling plate is sealed. between the end and a holding member attached to the housing with a gasket in between,
It is characterized by having an elastic sealing bellows directly attached to it.

Embodiments of the present invention will be described below based on the drawings.

Similar to the conventional method, a cooling plate 1 disposed on the furnace wall is located in a cooling plate housing 3 attached to the furnace shell 2, and a cooling water supply pipe 4a and a cooling water discharge pipe are installed at the rear of the cooling plate 1. 4b
In this configuration, the inner peripheral edge of an annular bellows 10 having elasticity as a bent cross section is fixed to the rear outer end of the cooling platen 1 as shown in the figure, and a gasket is attached to the cooling platen housing 3. The outer peripheral edge of the bellows 10 is fixed to the presser member 7 which is attached by sandwiching the bellows 8,
The gasket 8 and the bellows 10 provide a gas seal, and the bellows 10 absorbs the furnace load acting on the cooling plate 1.
The elastic action of the bellows 10 allows the support to hold, and the elastic action of the bellows 10 allows the cooling plate 1 to follow the movement of the furnace shell 2 and the furnace refractory 6 caused by thermal expansion.

In addition, when the material of the cooling plate 1 is copper, a mild steel material 11 is attached to the outer circumference of the cooling plate 1 for use.

The bellows 10 has a structure that can absorb displacement to some extent in the axial direction and in the direction perpendicular to the axial direction by appropriately selecting the shape of the ridges and the plate thickness.

With the above configuration, the gas inside the furnace leaking along the cooling plate 1 can be sealed by the bellows 10 at the outer end of the cooling plate 1, and the gasket 8 is also sealed, so that the gas leaks out of the furnace. Can prevent leakage.

Also, since the bellows 10 is directly attached to the cooling plate 1,
The in-furnace load acting on the cooling platen 1 can be transmitted to the cooling platen housing 3 via the bellows 10.

In this case, an in-furnace load acting on the cooling plate corresponding to the amount of displacement of the bellows 10 times the spring constant can be received.

If one more load is applied, the cooling platen 1 contacts the cooling platen housing 3, so the bellows 10 will not be damaged.

In addition, against the movement of the furnace shell 2 and the furnace refractory 6 caused by thermal expansion, the cooling plate 1 is prevented by the elastic action of the bellows 10.
can follow and move.

Furthermore, in the apparatus of the present invention, in addition to the above-mentioned effect, the connection between the cooling plate 1 and the cooling water pipes 4a and 4b is made visible from the outside, so that water leakage can be easily detected.

In addition, in the event that the bellows 10 is damaged and gas leaks, if the movement of the cooling plate 1 is slight, the cooling plate 1
It is also possible to prevent gas leakage by welding the flange portion at the outer end to the cooling plate housing 3.

As described above, according to the device of the present invention, (i) the bellows is directly attached between the rear outer end of the cooling plate and the holding member, so that the attachment of the cooling plate housing to the furnace shell is easy; Even if the accuracy is poor, it can be absorbed by the bellows and the installation accuracy can be relaxed, thus reducing the number of installation steps.

(ii) Due to the above (i), even if the mounting accuracy of the cooling platen housing is poor, the furnace gas will not leak out, and the gas sealing performance will be excellent.

(iii) Due to the elastic action of the bellows, the support can carry the load in the furnace that acts on the cooling plate, and also allows the cooling plate to follow the movement of the furnace shell and the refractory in the furnace caused by thermal expansion. .

(iv) Since a bellows is installed between the rear outer end of the cooling panel and the holding member, it is easy to inspect the cooling piping, and it is also easy to detect water leaks at the connection between the cooling panel and the cooling piping. be able to.

It can produce excellent effects such as

[Brief explanation of the drawing]

1 and 2 are both sectional views of a conventional gas seal device, FIG. 3 is a sectional view of a gas seal device of the present invention, and FIG. 4 is a sectional view of a conventional gas seal device.
The figure is a front view. 1...Cooling plate, 2...Furnace body shell, 3.
... Cooling plate housing, 6 ... Furnace refractory, 7 ... Flange, 8 ... Gasket, 10 ... Bellows.

Claims (1)

[Scope of utility model registration request] A cooling system in which a cooling plate is inserted into a cooling plate housing attached to the furnace shell, and the rear outer end of the cooling plate is aligned with the housing to seal the furnace gas passing between the cooling plate and the housing. The disk gas sealing device is characterized in that an elastic bellows for sealing is directly attached between the rear outer end of the cooling disk and a holding member attached to the housing with a gasket sandwiched therebetween. Blast furnace cooling plate gas seal device.